import router from './router'
import store from './store'
import { Message } from 'element-ui'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css' // progress bar style
import { getToken } from '@/utils/auth' // get token from cookie
import getPageTitle from '@/utils/get-page-title'

NProgress.configure({ showSpinner: false }) // NProgress Configuration

const whiteList = ['/login'] // no redirect whitelist

router.beforeEach(async(to, from, next) => {
  // start progress bar
  NProgress.start()
  // set page title
  document.title = getPageTitle(to.meta.title)
  // determine whether the user has logged in
  const hasToken = getToken()

  if (hasToken) {
    if (to.path === '/login') {
      next({ path: '/' })
      NProgress.done()
    } else {
      try {
        await store.dispatch('user/getInfo')
        if (store.getters.modules != null) {
          next()
          return
        }
        store.dispatch('user/ReloadMenu').then(modules => { // 获取用户可访问的模块
          if (modules.length > 0) {
            store.dispatch('GenerateRoutes', modules).then(() => { // 根据权限生成可访问的路由表
              router.addRoutes(store.getters.addRouters) // 动态添加可访问路由表
              // 解决路由刷新404界面
              router.addRoutes([{ path: '*', redirect: '/404', hidden: true }])
              next({ ...to, replace: true }) // hack方法 确保addRoutes已完成 ,set the replace: true so the navigation will not leave a history record
            })
          } else {
            next({ ...to, replace: true })
            return
          }
        }).catch(res => {
          // console.log('user/GetModulesTree  异常')
          next()
          return
        })
      } catch (error) {
        // remove token and go to login page to re-login
        await store.dispatch('user/resetToken')
        Message.error(error || 'Has Error')
        next(`/login?redirect=${to.path}`)
        NProgress.done()
      }
    }
  } else {
    /* has no token*/
    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, go directly
      next()
    } else if (to.path === '/login/wxlogin') {
      next()
      NProgress.done()
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      next(`/login?redirect=${to.path}`)
      NProgress.done()
    }
  }
})

router.afterEach(() => {
  // finish progress bar
  NProgress.done()
})
